Here's a list of excluded characters
Troopers: Starck, Death, Shore Scoundrels: Nest, Han BH: Dengar, 88, Jango Droids: HK, 88 Jedi: Revan, JKA, GK, Jolee Sith: Treya, Nihilus Nightsisters: Zombie, Asajj FO: FOO, FOS...
Forum Discussion
Mostly offensive can mean "better used on offense." You can get by with no tank and less damage if you are able to pick your battles carefully.
